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Foil 30 Events in the java.awt -- Mouse, Keyboard Interaction - II

From Jan 29 Delivered Lecture for Course CPS616 -- Java Lecture 3 -- Exceptions Through Events CPS616 spring 1997 -- Jan 29 1997. by Nancy McCracken * See also color IMAGE
Secs 44.6
The Event class has various special class (static) variables defined including
  • Event.F1 -- the F1 key
  • Event.UP The Up arrow etc.
The Component class (grandparent of Applet) has a rich set of Event handlers which you should override if you wish to process particular input
public boolean mouseDown(Event evt, int x, int y) {
  • anchor = new Point(x,y); // record position of mouse click
  • return true; // must do this
  • }
Other handlers are mouseDrag, mouseEnter (enters current component), mouseExit, mouseMove (with its button up), keyUp, keyDown


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